초록 ▼

A device for actuating an explosive charge downhole in a wellbore. The device includes a combustive reaction initiator actuated in response to a first pressure condition in a portion of the wellbore and an explosive charge actuator. A time delay device is provided wherein a combustive reaction is in

A device for actuating an explosive charge downhole in a wellbore. The device includes a combustive reaction initiator actuated in response to a first pressure condition in a portion of the wellbore and an explosive charge actuator. A time delay device is provided wherein a combustive reaction is initiated by the initiator and continues for a time delay period providing sufficient time for an operator to alter the first pressure condition to a second pressure condition desired at the time of explosive actuation. The delay device is operative at the end of the time delay period after initiation to actuate the explosive charge.

대표청구항 ▼

A device for actuating an explosive charge downhole in a well bore, comprising: first assembly which includes an impact piston; a first primer assembly for initiating a combustive reaction and actuated in response to an impact thereto from the impact piston of the first assembly which is, in turn, r

A device for actuating an explosive charge downhole in a well bore, comprising: first assembly which includes an impact piston; a first primer assembly for initiating a combustive reaction and actuated in response to an impact thereto from the impact piston of the first assembly which is, in turn, responsive to a first pressure condition in at least a portion of the well bore produced by the manipulation of fluid pressure in the well bore from the surface thereof; a second high output explosive charge for actuating said explosive charge; and a combustive delay means for providing a combustive reaction initiated by the first primer assembly and a continuing combustive reaction for a time delay period providing sufficient time for an operator to alter the first pressure condition to a second pressure condition desired at the time of explosive actuation, the combustive delay means continuing to provide a combustive reaction at the end of the time delay period after the initiation thereof to actuate the second high output explosive charge.